S-92620A541 1/4"-20 x 7/8" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 150,000 psi tensile strength for reliable performance in demanding applications
• Superior corrosion resistance through zinc yellow-chromate plating, extending service life in harsh environments
• Optimized thread engagement with UNC coarse threading and Class 2A fit for faster installation and secure fastening
• Maximum torque transmission via external hex drive design that prevents tool slippage during installation
• Enhanced durability from Rockwell C33 hardness rating, maintaining structural integrity under repeated stress
• Full thread coverage along the 7/8" length for consistent clamping force distribution
• Regulatory compliance assurance meeting ASME B18.2.1, RoHS 3, and REACH standards for quality and environmental safety

Professional Applications & Engineering Value

These Grade 8 hex head screws deliver critical reliability in heavy-duty industrial applications where fastener failure is not an option. The steel construction combined with zinc yellow-chromate plating provides exceptional protection against corrosion in manufacturing, construction, and machinery assembly environments. The UNC coarse thread design ensures rapid installation while maintaining secure fastening in vibration-prone applications. With fully threaded coverage and external hex drive, these fasteners eliminate common installation challenges while providing consistent clamping force across the entire engagement length. Engineered to withstand extreme mechanical stresses, these screws solve critical connection challenges in structural frameworks, heavy equipment, and high-vibration machinery where 150,000 psi tensile strength and Rockwell C33 hardness prevent premature failure and reduce maintenance requirements.

Specification Summary & Compliance

Manufactured to precise Class 2A thread fit tolerances with 1/4"-20 UNC coarse thread specifications. These Grade 8 hex head screws comply with ASME B18.2.1 mechanical standards and meet SAE J429 requirements for material properties. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring safe use across global markets. The 7/8" length and external hex drive provide consistent dimensional accuracy for reliable performance in industrial applications.